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" I@uitrit gisten gatea'tffire.

HNRY' W. 'Henrica or BnRLINsviLLn, PENNSYLVANIA.

l Letters Patent No. 71,609, dated .December 3,' 1.867.

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To ALL WHoM IT MAY coNonnN;

Be it known that l, HENRY W. HARPER, of VBcrlinsville, Northamptoncounty, Pennsylvania, have invented -a Machine for FinishingSlate-Frames; Aand do 'hereby declare the following to be a full, clear,and exact description of the same.4 y 4 VMy in vcntion consists of acertain mechanism, ful-ly described hereafter, forl planing the upperand lower Asuri`aces of a slate-frame, rounding the edges, and finishingand smoothing the frame, at'one operation, with' precision andrapidity.. f

- In orderto enable others familiar with machinery of this class to makeand use my inrention, I ivill now proceed to describe its constructionand operation, reference' being hadv to the accompanying drawing, whichforms apart of this specification, and in which- 'A i Figure is asectional 'elevation of my improved machine for finishing slate-frames.

Figure 2,- a plan view, and I Figures 3, 4, and 5 views of parts`detached and drawn to anrenlarged,v scale.

Similar letters refer to similar parts throughout the several views.'

The side frames A and A of the ma-cl'iinaearc connected together bycrosspieces-a, and, in suitable bearings secured to the frame, turnthree vertical shafts B, C, and D, each of lwhich is furnishedwith adriving-pulley,

- b. Tothe upper end ofthe shaft B is secured al detachable wheel, F,having upper :ind lower flanges c and c',

between which is a' groove,`d, (iig. A' cutter, e, similar to that of anordinary hand-plane, is secured to the up'per flange cof the wheel, thecutting-edge projecting a short distance into the groove d; and beneaththis cutter, and secured' .tc 1tileflange cf, is asimilar cut.t'er, e,(see fig s.l' 2 and A- vtoothed cutter-wheel, G, in 'which' is formed-.asemicircjilar groove, f, inline withth-el 'groove dof' the'ivheelFfis-sosecured to the u'pper endof the shaft VC as to bedetachable' therefrom,.,thef'bearings 'fr 'of .this 'shaft beingrendered adju-stable', as

' shown in fig. 4. At the upper end ofthe third shaft, l), issecuredadetachable"finishing-wheel, H, havingalso afgroove, y, concaveat the end, as shoivn in 'the drawing. It will be observed thatthegrooves of the wheels F, G, and H arcin line with each other, and that atable-or platform, Jpa'p'or'tion'of. xyh'ichis cutout'for the receptionof Aeach wheel, extends the entire length of the frameof the'machine.Guide-plates K (iig. 2) are secured to-the table between the wheels Fand'G and GandH, and two spindles, mandan', turn in the opposite sideframes of the machine, and are provided with feed-rollerspp, whichproject' over the table J. `The spindle m has a drivingpulley, g, and apulley, q', for the reception of a band pass/ing round a similar pulley,q', on the spindle mv v v Theseveral shafts being caused to rotate inthedirection of their arrows, fig. 2, and the spindles m and m v beingturned slowly in the direction ofutheir arrows, fig.V 1, the slate-frame(scejrcd lines, g. 2)in its rough unfinished state is placed upon thetable J, and is ii'rst passed beneath the feed-pulley p, i'vhicli movesit forward towards the wheel F, the cutters of'iithich plane theupp'erandvlower surfaces of the lframe simultaneously, as shown in g. 3,vthereby reducing it-to'a uniform thickness. Before the real-,end of theslate-frame has passed from between the iianges of the wheel F, itisopera-ted'upon by'lthe cutter-,Wheel Gr, andfits edge is rounded by thesame, as shown in iig. 4,'the guide-plate K, against which 'the edge of`the frame is maintained, preventing it from being cut away too much;After having `been ivrounded, the slatesframe, still resting against theguideplate K, is moved forward by the second feed-rollerp, and into thegroove g ofthe finishing-wheel 1I before its rear end has left thecutter-wheel G.' 'After the frame leaves the wheel H, by ivhichits edgeissmoothed and finished, the remaining three sides are subjected, 'oneafter the other, to the action of the planing,rounding, 'and Thebearings of the shaft C, as before described, are adjustable, so thatthecutter may be moved further from or nearer to the guide-plate K, atpleasure.V

The finishing-wheel may 'consist of what is termed vnlcanite cmery; orit may be a plain wheel properly coated with pulverized quartz, glass,or other material for imparting a smooth surface to wood. I l i It willbeevident that, although I have shown th'ewheels as arranged to revolveinl a horizontal plane, the

'machinemay be so arranged that they will turn'in a vertical orinclined'plane without departing from the main features of myinvention.' It will also be evident that the faces and edgesofslate-frames may be reduced to a uniform finish with rapidity andprecision by the above-describedmechanism.

-I claim as my invention, and 'desire to secure by Letters Patent Thecombination of the planing-wheel F, cutter-wheel G, finishing-wheel H,and guide-plate K, the whole beingv constructed and'arranged for jointaction on the slate-frame, substantially as set forth.

In testimony whereof, I have signed my name to this specification in thepresence of tivosubscribing witnesses.

H. WM. HARPER.

Witnesses:

JOHN N Enr., 'JNo. D. Scimmia.V

